@Jc2001 Apologies for the slow reply Jc, and I appreciate that the ship may have long since sailed on this one.
Plus the OP is asking for opinions and advice on a public forum.
You are 100% correct, and that's not something I'd seek to curtail. Outside of whatever "house rules" Mumsnet have and the obvious stuff like not making a thread about "I'm in a packed theatre, should I shout FIRE just for a laugh?" we're all free to say what we like. Positive or negative, good or bad, it's the whole point of a discussion forum, right?
What I would say though is there's a big difference between disagreeing with someone and attacking someone. Or if I were to - hypothetically - not understand the question someone was asking, and decided it was grounds for me to start acting like I'm superior because I don't understand the words I'm reading, and therefore the person who wrote them must be "stoopid". Saying "the problem is that you think x²=y when in reality x²=z" is worlds apart from saying "why are you even asking how to use a stepladder safely? I can cut in the tops of the walls whilst stood on the floor because I'm 6'5", so I don't see what the problem is?!?!?".
I don't personally feel that "I'm in this horrible situation, everything's gone tits up, the whole world is falling apart around me and I don't even know how I got here, things were tough then I blink and now everything's fcuked and I don't know what to do!!" is too hard to understand. Nor do I see someone making themselves vulnerable, putting their dirty laundry on display for the whole world to see and asking for help as an opportunity to brag.
This is however just my personal opinion, which I'm just as entitled to posit as anyone else is to their own - and I wouldn't feel even a fraction confident enough to post this somewhere that another user couldn't retort, be it a standing ovation, a "Yeah, fair enough but you're kicking the arse out of it now", or even a "Steevo shut up man, no one cares, just leave it bruv yeah?".